Equalized arm clamp



. 1925 4 Shets-Sheet 1 l CLMPED D. C. KLAUSVMEYER EQUALIZED'ARM CLAMP Filed March 10 l Juney 17, 1930.

Syvum/woz June 1.7, 1930. KLAUSMEYER EQUALIZED ARM AcLAMP Filed March 1Q, 19.25 4 Sheets-.Sheet 2 @Ew/w MMM/MM June 17, 1930. D. c. KLAUsMEYER :1,764,514

EQUALIZED ARM CLAMPy Filed March 10 1925 4 Sheets-Sheet 3 further object of the invention is to' 'f provide a single actuating means for both of the clamps and to provide an' equalizing device between the two to insure `complete actuation of both clamps.

Still another object of this invention is so to-vform thearm and the lgirdle as'to provide `a reinforcing elementv integral with Y the armV and extending around-the girdleA andmerging thereinto at theV sideY opposite to lthat to` whichvi the arm projects, therebyY to transmit to the opposite side of the girdle the lateral pull produced by the '-weightof i the arm anddrill head.

Other objects and advantages will bein part indicated inthe following description V and in part rendered apparent therefrom in connection withthe annexed drawings.-

To enable others skilled inthe art lso fully to apprehend the underlying features hereof that they may embody the same in ,the various ways contemplated Vby, this invention. drawings depicting a preferred typical con-V struction have been annexed as a part of this disclosure and, .such drawings. like characters of .reference denote corresponding V parts throughout all the views, `of which:

`Fig.3is a detail plan ofthe rear end 'of :the .radial arm-and-girdle,"showing more.V

' :particularly themeans to.; clamp the girdle tothe, column.. -Fig 4 isa' diagrammatic view showingvarious positions ofthe com bined clampeactuatingfand arm translating l vcontrollinglever. .Eig' 5isa viewsimilar is a'det'ail section ofthe lower portionofthe to F ig. l but showing theinvention embodied in ia radial drill having armv translating I mechanism'carried by the radial arm, saidr Vtranslating mechanism being shown in de- ;Velopment adjacent the column,Y Figs (i and 7 are views similar to Figs-2 andbut lof the drill shownin Fig. 5. Fig. 8 isa detail section on the line8-.-8o f Fig. 5. rvFig-9 arm clamping and' arm .translating controlling: device shown'inlig 5. t Y

`Referring vmore particularly .to the .drawings and, especially toEigs l; V23a1`id tithe invention is disclosed yasembodied in a radial drill includinganv upright column l-upon which is slidably mounted a -girdle 2 formed 'integral with. a radial-arm 3. The column Y shown is of the cylindrical type land the girdle completely embraces the columny but 'it is Yto be understood that this nventnn is als.adaptable-terminus 'other types. 0f" CO1# umns and contemplatesvarious othermeans for ,Slldely mounting the arm @miie @plum kits various positions vof adjustment.

Iand for securing the arni to the column in Also theV columnl may be al stationary` member or, to permit of horizontal movement of the arm, it may be in the nature of a sleeve rotatably supported' upon a centralpost. The

Aradialarm carries the usual drill-,head within which the usual drill spindle is rotatably journaled. Inasmuch asv the construction of the drill head andtherrotating means for the spindle are'oldv and lwelllrliown and as theyform no part of the present invention,

illustration andY detail description thereof" is deemed unnecessary.

` Translation ofthe" arm on the column may screw may enter lthe column at any suitable place and Aiow through ashaftf? gjournaled coaxialwith the column. A cap 8 is secured upon. the upper end of the column and above this cap is secured to the shaft ,7 a relatively: wide gear 9 constituting one Vdriver for a Vtumbler gear 10 vlater to be referred to. A

gear ,ll7` fixedr to. ya yshaft12 parallel with the shaft, mesheswithfthegearand serves as ,'afdriyerfona gear13.carrie d by avertical shaft 14C.l The gearfll is approximately oney half the width of the gear 9 .and the gear 9 yprojects above the gear "ll for purpose .later tol 'be .explained The Shaft le acts through any suitable train of mechanism, to

rotate the drill Spindlefnot shown. .Fixed tothe'shaft l2aboye thegear llis a gear 15 which constitutes asecond driver for the tumbler gear 10. The tumbler gear is 3journaled .upona `pin v 16 carried by one arm 17a ofa bell-crank lever 17, fulcrumednp'on the upperend of the elevating screw .4'. A gear 18 issecured upon the screw .lfbeneath the leverA 1 7 and is maintained permanently Ain mesh with thetumbler gear.` It" will readily be perceived.thatinasmuch as fthe gears '9 and 1 5-v are rotated in reverse directions,V and as the tumbler-gear isfadaptedA to connectV either of these gears with the gear 18,'the direction of rot-ation produced in the elevating screw will depend upon with which of the drivingfgears'the tumbler gear is engaged. The other arm 17lu of the bellfcrank lever` isprovided with a gear-'segment .l9 Vmaintained permanently in mesh with a similar segment 2O secured upon the upper end of a roclrlshaft 2l journaled lengthwise of the column l.

Fixedupon the lowerfend of the shaft 21 is aV collar .2li having'an annular flange 25 provided. witha notch 2G'. The colla-r is also formed with a portion27 inthe nature of a vbushing' by means ofl which the rock-k shaftis journaled ina boss 28 integral with the'column Vl. Theuppercnd ofthe rockbeeflected bymeans Vtoffia screw rotatably vjournaled in bearings 5"-and 6 provided at ythe ,upper and lower ends, respectively .of v the column land having a` threaded connec-4 tion with the'arm-S.` Power to rotate the v be oscilletedfby `@combined cl'amp-'ctuting -213cm-ttrainsletin-g controlling lever! VBO 'Y xedguponwa tube 31 loosely :journztled Aco- ."'JXial-with the roekfshaft infbiearingbosses spring-plunger 432,- eairied lbyfthelf-lever., 41s adaptedj t'oentei?z the notch 26 vvzuid; when in df k i*iotch,v Vzil'iords 22;! driving' connection -be-A tvveen"the,y level' :Valid tliefoolleii Qoar'red [by,lthelioekfshaft,v whereby, the `shziftQlyvvill the letter is"f'nioved'` by, theii'operatong To d 'sn'eetedwvith ,the noch-she'ft, thehub: of "the,

' lever; 30 to be disconnect-ed; from ,theV ii'ocl# sha-ft when the` desifred: 'translation .ofgith'e f `rhas been" effected. '55 The lleven 30Qhavmechanism it may' Ethen' be given :a further movement f ateii` the'k abutment has engaged ielease ,"*ofythe leven kvfrom the 1- tra-nslziting 'niexilialifusniV the tumbler gear' leven 177 ,inaticellyf shifted y'to zigneutialfpos'ition as Willy now bel described@ e VReferring;{110W} gto "blei" L feai'sfjivill ,(iinless 1 4p1:evjented .i manun ellvhold'ing r the llevel* 30 in :0h62 Of 'anni .iti'ensletingg positions) thioWX-the tumbler thereby discontinue the rotation O the afrnif 'l l' l tmnslating"screwi Y, Aj spring detent 22% cariiedbyqthe cfa'p 8,* is adapted -to engage@ i `notcliQ formed in thehub Volithe segment ,l vh-en thejturnbler gea is fotoibi/ygidisconf-v rbetweenlthefgearsglahdtl.- v j f l The? :afin having .been translated f t These lateral*pressTiresA spring 38,k tofwithdmw theafendgofwthe' yopositesides owtheigir'l 'thestop screw, tofzictliaite .theclanips 1 Upon itsoppositje end sas rslt-1@fand 'flo'nftheisides '1* segment k120, Vsh aft' 21 and collar '2l-,2nite auto- 'the-frecol-umn; before: thejdrilling. operation is eiging Vthe Y rdlef opp'osi his a :strain upon the umn; tending ,turn it'. *This Sfr .Where fthe slack prodiiced: {if-These splits A1 l p ioduce oppose 2t 27E-1a sleeve 49havingformed-integra; t `therewith; its opposite lends, Worms 2,50

y Referringnow to Figa-it: will be seen that although the lever V3v() controls both,

notbe effective at the same time; thus translation or vice 'versa is4 precluded; In

` the positiondesignated as fu the arm translating mechanism 1s in neutral andthe armvr is clampedto the column. Now'vif it isA def sired` to change the elevation'of' `the armk A the leverBOis first moved to the position w -which movement turnsv the tube 31 land,

through vthe `mechanism` above described,

` arm fromthe column. The next movementv of the lever is lto the position .fr where 'the spring plunger v32,kr engages the notch V26 `in the collar 24 fixedto the arm translation controlling shaft`21. (It is tobe remembered that upon the Vprevious actuation ofthe l"clamps the translating mechanisminclud ing the collar 24, was `automatically Vreturned to its neutral position.) :This'moveis merely an idlemovement V.since the clamps have already released fthe: column. From theposition m the lever may be moved either t the Position y orio the position 12.*' 1r mOVGd t0 y'the gearzsegmen't 20 `will .move

. lio

the-leverxl? Lclockwise,1as viewedfin Fig. 2,

and cause the tumbler gear to beV meshed l with the gear 15', whereupon the screw. l

will be rotated in a 'direction to elevate Vthe arm, and the abutmentili will be brought into engagement with the stop-screw 36 thus preventing further movementof thelever to' the right While the plunger engages `the i notch 26. Movementfof thelever'from'the gear with the driving? gear Qtherebylrotat- .ing the screw in.the,reversedireetion and causing .the arm to belowered."v V.The desired adjustmentv of the varm havingfbeen made, the operator presses V'the trigger 37 which releases the plunger-from the notch 26 and permits the tumbler gear automaticallyy to.

be moved to its neutral position thereby 'brin ino' the arm translatino' mechanism 'to rest. flhe'lever may then' be move-dto its position c thereby clamping the girdle to the column in its new position.y

',-It will lreadily beperceived th-atlinas- YV-much as a single'a'ctuator Vis provided for both clamps, ,one` clamp mightbe tightly closed before theother and, unless special provisionwas made, th'emovement of the actuating lever would thereby be. arrested vand Vthe 'looser clamp could not be causedto function. This invention overcomes "{this dilicultyby a verpingenious equalizing de-V vice. Upon actuation "of the'flever to close theclamps ysh'ouldfone clamp be closed before the other, a further rotary-movement of-'the lever 30 and sleeve 49 will cause the sleeve .to be both rotated and translated on the tube 31 to which it is splined,'thereby the actuating lever andthe clamps constitutes a power multiplying deviceV and therefore, with this 'device,` the 1 clamps may be more tightly'closedwith a predetermined pressure on the lever, than if the lever was Y I y 'connected directly to the nuts 4l? and 48. lcauses theclamps4 to be released to free the To prevent the arm being elevated or depressed an undue amount, automaticl limit stops 'are provided;l These consist of ycams 52 and'53 carried respectively' by a collar 54 fixed to the shaft21 adjacent the cap `8, and bythe hub 30X of the lever 30, where upon eXtreme translation ofthe arm, they are engagedby studs 55 `and 56 carried by .the girdle2. This engagement causes the rendering the translating embodied in'arradial drillequipped with a l'different Yform. of 'arm translating mecha-f' nism. As shown in these figures the column,

rvthe girdle and theaclamping mechanism are substantially the same as described in reference to .Figs l, 2 and 3 and reference vmay vtherefore be-'had to the above description for theoonstruction and operation of the clamping jmechanism. For convenience the rsame reference oharactershave been applied -to Figs-Q 6, "1',y 8 and 9 aswere used in connection with Figs. 1,2 Vand 3 in so far as thel y parts arealilre. f y

position to'the position a moves the lever I 17 anti-clockwise V'and *meshes* the tumbler The arm translating mechanism disclosed more particularly in Figsy, 6 and 7 com'- prises a power driven shaft which may bc vrotated by any suitable mechanism. This shaft is preferably located coaxial with the the cap 8, a gear which, (through an idler gear 61 journaled on va stud 62 carried by the cap) drives a similar gear 63 fixed upon an'upright shaft 64.- Nonrotatably carried by the column 1 is a screw 65 uponwhich is threadedia nut 66 provided withr a shoulder 67'supp'orting an anti-friction thrustbearing supported. `Afnor1nally inactive v auxiliary safety nut 69 also is threaded upon the screw '65 Vand serves toi support the arm upon vfailureof the nut 66, as by the stripping lio rcolumn 1 and carries at its upper end, above 68'upon-which the weight o fthe .arm is "Jl sequent, translation of; the farma Tlie lever isv then'fmoved to the positions, infwliich position the.;` plunger head'-A 322 passes through the notch; 90 and engages the notch 93 in thexcollai-"QQ` securedupon the shaft Q1.

The clampsjbeing-now released and the lever-f' .connected with the 'translating mechanism, the lever may be moved either clockwise to` j the position a .to lower .the arm, or anticlockwise to the position #to elevate the arm as previously described.Y Y Abutinents 33 and 3,4; engage the stop screws 35 and 36- and limit the movement.01":l the lever 30 When connected with the vtranslating mechanism. 'lhe lever may `again be moved to close the plunger head '32@from the notchesfSBa-id 90. *Thus-it will -be perceiif'e'd that although the lever 13.0 controls lboth the arm transla-t ing andthe armnclamping mechanism thel vsimultaneous actu-ation? of these lmechanisms Y f w l Whichthe arm projects, to vclamp the uppei` ,Y vWithoutl `further analysis, the foregoing Will so fullyA reveal tl'i'e gist of this invention is Veil'ectivelyY precluded.

that others can,-'by applying current lmo'vvl edge, readily adapt it for variousutilizations by retaining one ormore of theY fea# tures that, V:trom the standpoint of the prior.l art, fairly constitute essential characteristicsof either the generic .or speci-fic aspects of this invention and, thereoresuch adapV tations should-y b'e, and are intended to,y be,`

comprehend'ed Within the meaning andyrange of equivalency `ofi-the fol-l(wiringV claims. I

lowing combinations and elements,or,equiv alents thereof,l by Letters Patentv of the Y United States: v

LA drilling machine combining col lower part of the arm on the opposite sidev 'whereby the 'arm may `be 'clampedfrela-v tively easy and Withoutdisturbing the adr justed position. .u y .1 y

l2. A drilling machine combining acol umn.;V a girdlevertically movable onY the col-v Vumn a plural-ity" of clamps` lat the opposite sides of the, girdle., and column respectively to secure thefgirdle to. the :,column;` anda -single actuating means .for 'all of saidV I portions adapted to grip said column a bolt Vand a nutior drawing said portionsfto` clamps. ,Y .Y A, drilling machineA combinin a col;-

umn; anV arm projecting laterally iromthe columnY andprovided yWitha: girdle aembi'ac Having thus revealed this invention, I] vclaim as new and desire to secure the follocated to be eiiective L ine-eins i infgthegcolumn, saidfgirdle being'isplitat.

its oppositeV .ends and. at itsi opposite sides ';f`

andmeans tofcontractsaid split portions toumn;'anjarmgprojecting laterally 'from said. column; and.,vr vertical-ly movable thereon; and means'ylocated at', the oppositeV sides of L said-Eccolumn, and vadjacent the upper, and lower sides respectively ofthe portion of the arm movable thereon to secure said arm against; vertical l movement on said column.

umn; an arm projecting laterally from said column and :having-a, girdleslidable there-` on .means," located at `the side of the column to: Which the..armprojects, to clamp; the upperl portion of said lgirdle .tof said column; andmea-ns located at the opposite side-oi:` the column toclamp rthe lovver portion of said.

girdle to lthe-column. g t

6.1 A drilling Vmachine Ycombining, aucol`- umn; an arm projecting laterally from said Acolumn andhavinga girdle slidable thereon;

means, lfocatedat thesidefof the column lto vumn an arm' j proj ect'ing laterally from; said column and having a girdle'slidablethereon means,,located atftheaside of the column to which the'arm projects,'to clamp the upper portion of'said girdleto said column; means loca-ted atthe; opposite ,side of; the column to. clamp VthefloWer portionofsaidgirdle toj the,4 column; i( an; l actuating. lever` yassociatedvvith each clamp; Vand a single con.- trolling Ymechanism` for said levers, said controllingvmechanism embodying an equalizfing dev-ice; 1 8. vAv drilling machine, combining a colf umn; arm vertically movabley onsaid col-umn.; a` plurality vof independent clamps located at diamet'rically`v opposite sides of said column 'at thelupper and lower sides respectively of said :arm to securesaidiarm to said column and vasingle actuating 'mechanism orall of saidjclamps,said actuating m,echanism,Y including an equalizing device. 9.5A `drilling emac'hinef combining a col-V umn; an armextending to one side ofthe column and vertically movable thereon t-Wo, Y

independent clamps c'arriedbyfisaid arm and actingTV respectively; upon. the sides.y of said columnV adjacent to and 'remote from the arm for securing said a'rmfto said column, said'.

clamps each including relatively `movable gether; a clamp-actuating arm carried yby ico 'translating' and arm clampingmeans, said i actuate said clamping. means... g

'lever being movable a'predetermine'd extent toi-enden keffective .said translating meansy' meansto limitthel movement'cf said vlever whenfconnected with said translating means;

means. to .disconnect said -leverfrom theY .translatingmeansf; means acting at the disconnectionof thefl'ever from thetran'slating means to render the translating means 11neiiective, said leverv then beingy adaptedto 19. Ina drilling machine, a'r column; an arm shdably mounted` on the arm; lmeans to translate theV arm on the.column,..sa1`d means including al screw hayinga threaded rconnectionjwith Vsaid arm; agear on said screw; a lever fulcrum'ed co-asialV withsaid' screw; a tumbler gear carried by said .lever andmaintained permanently 1n mesh w1th said first named gear; two oppositely rotated y driving gears -with whichsaidtumbler' gear is adapted selectively to be meshed;ia sha-ft; an operative connection between vsaid shaft and said lever; means lto oscillatesaid shaft4 tocause it to shift said lever, andrsaid tuin-KV bler. gear, said :lastnamedv means 'includingV an :actu-ating lever releasably vattached 'tofY *means, said controlling lever being permanently connected-with said Vclamping means a rock'shaft adapted to` control thetranslaztsaidrshaft; means to releasesaid actuating lever from said shaft, said driving gears-andLA tumbler gear being so related that the tumbler gear is automatically disengagedv from the driving gear vwhen theactuating lever vis released; and meansY to retain saidV tumbler gear in itsfneutral position. l Y ,Y '20; A drilling machine combining .a col-P' umn; an -arm Y slidably mounted on 'theY column; means to translate the a-rm onthe v column; means to clamp the. armto'fthe cOlumn; asln-'gle controlling lever'for said larm translating means and sardi arm clamping .arm slidably mounted on the column; means to translate. the arm on the. column,-said ymeans comprising a screw supported from the column; a nutfrotatably and non-translatably journaled in the armr and threaded upon said screw; two. gears carried by saidV nut; anidler gear in meshwith one of said gears; a power.. driven shaft parallel with Vsaid screw; a gearloosel-y Vjournaled Von said shaft; means'Y selectively` to .shift 4said last named gear into'meshvwith onefof the gears on the lnut or into'mesh withsaididler gear;

Vand means Yactive aftervsaid gears have been 'mea-,eraf f meshed to secure said .loosely .journaled gear to said shaft to cause rotation of said nut? and'thereby'vertical movementV of the arm.

22. In a drilling machine, .a'columm an y 1 shaft af shaft` Zparallelv'with said screw;

miter gears secured to lsaid lastme'ntioned. shaft and saidv larmfshaft and serving to rotate oneof said shafts, from the other; a gearf'loosely j ourna'ledron the. shaft parallel with' the. screw; means to shift said .last named gear intov mesh with the gearV on said num-.and means tov lock said loosely'journaled gear to one ofsaidA miter-gears* to eflfect rotation of saidnut and thereby trans lation ofthe arm;-

' Y 23.1K 'drillingeV machine Vas set Vforth in claim 21,characteriied by' this that the meansf' tofshift the loosely journaled gear comprises an oscillatoryshaft; a vmiter gear secured'to said shaft; .a second miter gear in mesh with the first named miter gear; a gear shifting arm, engaging said loosely mounted gear and adaptedfto be oscil'lated by said second miter gear turn said oscillatory shaft. 241; In a drillingmachine, acolumn; an arm slidably mounted on thel column; means to translate'the' arm on the. column, said means comprising a screw carried 'by the column; a nut rotatably and: nontranslata bly-'carried-fby the arm threaded upon and a llever to said screw; a gear vsecured to said nut; va

vpower drivenV gear normally "disconnected l'fromthe gear on sai'dnu't means A`to, clamp i said armto {said sleeve;and va single lever to-actuate said.'` ar'mffclamp andto' cause" said power driven gearto Vbevshiftedinto mesh withther gear onsaidnut. f

QA drilling 4machineV as set forth in claim-24t characterized by this that the single actuating lever-for the arm translating mechanism and theY arm clamping mecha` nism is so controlled as to permit theactuation of the clamp only when 'the translating mechanism 1 is inoperative and actuation of. the translating -mecllasm only when the'. clampV is released.A 7'

Inwitness'whereof, I have hereunto subscribed'my'name. y Y DAVID .CQ KLAUSMEYER.`

iis

CERTIFICATE OF CORRECTION.

Patent No. 1,764,514. Granted June 17, 1930, to

DAVID C. KLAUSMEYER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 7, line 53, claim l2, .before the word "clamp" insert the word to; same page, line 125, claim 17, for "natural" read neutral; and that the said Letters Patent should be read with these corrections therein that the same ma;r conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of September, A. D. y1930.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

